[SRU][F][PATCH 03/19] ASoC: amd: add acp init/de-init functions
Hui Wang
hui.wang at canonical.com
Thu May 28 02:10:47 UTC 2020
From: Vijendar Mukunda <Vijendar.Mukunda at amd.com>
BugLink: https://bugs.launchpad.net/bugs/1881046
Add Renoir ACP PCI driver init/deinit functions.
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda at amd.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
Link: https://lore.kernel.org/r/20200518171704.24999-4-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie at kernel.org>
(cherry picked from commit 85ded495640e63282aa83583ab64304a9912303d
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git)
Signed-off-by: Hui Wang <hui.wang at canonical.com>
---
sound/soc/amd/renoir/rn-pci-acp3x.c | 143 ++++++++++++++++++++++++++++
sound/soc/amd/renoir/rn_acp3x.h | 16 ++++
2 files changed, 159 insertions(+)
diff --git a/sound/soc/amd/renoir/rn-pci-acp3x.c b/sound/soc/amd/renoir/rn-pci-acp3x.c
index 56b76e355cd4..429813f6ba1c 100644
--- a/sound/soc/amd/renoir/rn-pci-acp3x.c
+++ b/sound/soc/amd/renoir/rn-pci-acp3x.c
@@ -7,13 +7,146 @@
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/io.h>
+#include <linux/delay.h>
#include "rn_acp3x.h"
+static int acp_power_gating;
+module_param(acp_power_gating, int, 0644);
+MODULE_PARM_DESC(acp_power_gating, "Enable acp power gating");
+
struct acp_dev_data {
void __iomem *acp_base;
};
+static int rn_acp_power_on(void __iomem *acp_base)
+{
+ u32 val;
+ int timeout;
+
+ val = rn_readl(acp_base + ACP_PGFSM_STATUS);
+
+ if (val == 0)
+ return val;
+
+ if ((val & ACP_PGFSM_STATUS_MASK) !=
+ ACP_POWER_ON_IN_PROGRESS)
+ rn_writel(ACP_PGFSM_CNTL_POWER_ON_MASK,
+ acp_base + ACP_PGFSM_CONTROL);
+ timeout = 0;
+ while (++timeout < 500) {
+ val = rn_readl(acp_base + ACP_PGFSM_STATUS);
+ if (!val)
+ return 0;
+ udelay(1);
+ }
+ return -ETIMEDOUT;
+}
+
+static int rn_acp_power_off(void __iomem *acp_base)
+{
+ u32 val;
+ int timeout;
+
+ rn_writel(ACP_PGFSM_CNTL_POWER_OFF_MASK,
+ acp_base + ACP_PGFSM_CONTROL);
+ timeout = 0;
+ while (++timeout < 500) {
+ val = rn_readl(acp_base + ACP_PGFSM_STATUS);
+ if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_OFF)
+ return 0;
+ udelay(1);
+ }
+ return -ETIMEDOUT;
+}
+
+static int rn_acp_reset(void __iomem *acp_base)
+{
+ u32 val;
+ int timeout;
+
+ rn_writel(1, acp_base + ACP_SOFT_RESET);
+ timeout = 0;
+ while (++timeout < 500) {
+ val = rn_readl(acp_base + ACP_SOFT_RESET);
+ if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK)
+ break;
+ cpu_relax();
+ }
+ rn_writel(0, acp_base + ACP_SOFT_RESET);
+ timeout = 0;
+ while (++timeout < 500) {
+ val = rn_readl(acp_base + ACP_SOFT_RESET);
+ if (!val)
+ return 0;
+ cpu_relax();
+ }
+ return -ETIMEDOUT;
+}
+
+static void rn_acp_enable_interrupts(void __iomem *acp_base)
+{
+ u32 ext_intr_ctrl;
+
+ rn_writel(0x01, acp_base + ACP_EXTERNAL_INTR_ENB);
+ ext_intr_ctrl = rn_readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
+ ext_intr_ctrl |= ACP_ERROR_MASK;
+ rn_writel(ext_intr_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL);
+}
+
+static void rn_acp_disable_interrupts(void __iomem *acp_base)
+{
+ rn_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base +
+ ACP_EXTERNAL_INTR_STAT);
+ rn_writel(0x00, acp_base + ACP_EXTERNAL_INTR_ENB);
+}
+
+static int rn_acp_init(void __iomem *acp_base)
+{
+ int ret;
+
+ /* power on */
+ ret = rn_acp_power_on(acp_base);
+ if (ret) {
+ pr_err("ACP power on failed\n");
+ return ret;
+ }
+ rn_writel(0x01, acp_base + ACP_CONTROL);
+ /* Reset */
+ ret = rn_acp_reset(acp_base);
+ if (ret) {
+ pr_err("ACP reset failed\n");
+ return ret;
+ }
+ rn_writel(0x03, acp_base + ACP_CLKMUX_SEL);
+ rn_acp_enable_interrupts(acp_base);
+ return 0;
+}
+
+static int rn_acp_deinit(void __iomem *acp_base)
+{
+ int ret;
+
+ rn_acp_disable_interrupts(acp_base);
+ /* Reset */
+ ret = rn_acp_reset(acp_base);
+ if (ret) {
+ pr_err("ACP reset failed\n");
+ return ret;
+ }
+ rn_writel(0x00, acp_base + ACP_CLKMUX_SEL);
+ rn_writel(0x00, acp_base + ACP_CONTROL);
+ /* power off */
+ if (acp_power_gating) {
+ ret = rn_acp_power_off(acp_base);
+ if (ret) {
+ pr_err("ACP power off failed\n");
+ return ret;
+ }
+ }
+ return 0;
+}
+
static int snd_rn_acp_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
@@ -48,6 +181,9 @@ static int snd_rn_acp_probe(struct pci_dev *pci,
}
pci_set_master(pci);
pci_set_drvdata(pci, adata);
+ ret = rn_acp_init(adata->acp_base);
+ if (ret)
+ goto release_regions;
return 0;
release_regions:
@@ -60,6 +196,13 @@ static int snd_rn_acp_probe(struct pci_dev *pci,
static void snd_rn_acp_remove(struct pci_dev *pci)
{
+ struct acp_dev_data *adata;
+ int ret;
+
+ adata = pci_get_drvdata(pci);
+ ret = rn_acp_deinit(adata->acp_base);
+ if (ret)
+ dev_err(&pci->dev, "ACP de-init failed\n");
pci_disable_msi(pci);
pci_release_regions(pci);
pci_disable_device(pci);
diff --git a/sound/soc/amd/renoir/rn_acp3x.h b/sound/soc/amd/renoir/rn_acp3x.h
index da5715759646..ec2a85085163 100644
--- a/sound/soc/amd/renoir/rn_acp3x.h
+++ b/sound/soc/amd/renoir/rn_acp3x.h
@@ -9,6 +9,22 @@
#define ACP_PHY_BASE_ADDRESS 0x1240000
#define ACP_DEVICE_ID 0x15E2
+#define ACP_POWER_ON 0x00
+#define ACP_POWER_ON_IN_PROGRESS 0x01
+#define ACP_POWER_OFF 0x02
+#define ACP_POWER_OFF_IN_PROGRESS 0x03
+#define ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK 0x00010001
+
+#define ACP_PGFSM_CNTL_POWER_ON_MASK 0x01
+#define ACP_PGFSM_CNTL_POWER_OFF_MASK 0x00
+#define ACP_PGFSM_STATUS_MASK 0x03
+#define ACP_POWERED_ON 0x00
+#define ACP_POWER_ON_IN_PROGRESS 0x01
+#define ACP_POWERED_OFF 0x02
+#define ACP_POWER_OFF_IN_PROGRESS 0x03
+
+#define ACP_ERROR_MASK 0x20000000
+#define ACP_EXT_INTR_STAT_CLEAR_MASK 0xFFFFFFFF
static inline u32 rn_readl(void __iomem *base_addr)
{
--
2.17.1
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